Reversible ferromagnetic spin ordering governed by hydrogen in Co-doped ZnO semiconductor

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We report a reversible manipulation of short-range spin ordering in Co-doped ZnO through hydrogenation and dehydrogenation processes. In both magnetic-circular dichroism and superconducting quantum interference device measurements, the ferromagnetism was clearly induced and removed by the injection and ejection of hydrogen, respectively. The x-ray photoelectron spectroscopy results and the first-principles electronic structure calculations consistently support the dependence of the ferromagnetism on the hydrogen position and the contribution of transition metal ions. The results suggest the ferromagnetic interaction between Co ions can be reversibly controlled by the hydrogen-mediated intrinsic spin ordering in Co doped ZnO. (C) 2009 American Institute of Physics. [doi:10.1063/1.3257733]
Publisher
AMER INST PHYSICS
Issue Date
2009-10
Language
English
Article Type
Article
Keywords

INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; MAGNETIC SEMICONDUCTORS; BASIS-SET; TRANSITION; METALS; OXIDE

Citation

APPLIED PHYSICS LETTERS, v.95, no.17

ISSN
0003-6951
DOI
10.1063/1.3257733
URI
http://hdl.handle.net/10203/228687
Appears in Collection
NT-Journal Papers(저널논문)
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